[1] In 2010, Mier played with the Single-A Lexington Legends, and hit .235 with 2 home runs and 53 RBI over 131 games.
After the season ended, Mier played 17 games with the Mesa Solar Sox of the Arizona Fall League.
[1] In 2013, he was promoted to the Double-A Corpus Christi Hooks, but put together a disappointing season both offensively and defensively, batting just .194 with 5 home runs and 28 RBI and adding 20 errors.
[1] Mier began the 2014 season with Corpus Christi, and was promoted mid-season to the Triple-A Oklahoma City RedHawks.
[1] On November 23, 2015, Mier signed a minor league contract with the Toronto Blue Jays that included an invitation to spring training.